Hmm, B.F. Skinner references never peter out completely. There may just be a few years between them.

A friend of mine studied Skinner as his area of expertise. The last time I saw him he showed me a hand written letter from Skinner accepting him as an intern. My friend is probably retired by now. Time whips by when I am not paying attention.

So, I read the article, and I still don't see what Chimpanzees have to do with the Start Menu.

Chimpanzees had nothing to do with the Start Menu. A guy who used to work with chimpanzees used his knowledge and experience in teaching things simply, one step at a time, to design what became the Start Menu.